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. 2012 Nov 9;7(11):e49436. doi: 10.1371/journal.pone.0049436

Table 1. Sequences of the peptides used in the Ala-scanning investigation and the modified peptides.

Peptide Sequence Molecular weight (g/mol) PI Average hydrophilicity Peptide incorporation (% of cells) Disintegration of MT (% of cells)
NFL-TBS.40-63 Biotin-YSSYSAPVSSSLSVRRSYSSSSGS-CONH2 2712.4 10.3 −0.1 51.2±4.2 58.4±2.3
Alanine scan
Tyr1Ala Biotin- ASSYSAPVSSSLSVRRSYSSSSGS-CONH2 2620.1 11.2 0 0 24.1±4.6
Ser2Ala Biotin-YASYSAPVSSSLSVRRSYSSSSGS-CONH2 2696.4 10.3 −0.1 5.9±6.4 23.5±1.1
Ser3Ala Biotin-YSAYSAPVSSSLSVRRSYSSSSGS-CONH2 2696.4 10.3 −0.1 0.8±1.2 19.1±0.9
Tyr4Ala Biotin-YSSASAPVSSSLSVRRSYSSSSGS-CONH2 2620.4 11.2 0 5.3±2.4 24.4±4.6
Ser5Ala Biotin-YSSYAAPVSSSLSVRRSYSSSSGS-CONH2 2696.4 10.3 −0.1 16.0±1.4 23.6±1.6
Ala6Ala Biotin-YSSYSAPVSSSLSVRRSYSSSSGS-CONH2 2712.4 10.3 −0.1 50.3±4.6 48.1±6.6
Pro7Ala Biotin-YSSYSAAVSSSLSVRRSYSSSSGS-CONH2 2686.4 10.3 −0.1 16.7±4.6 26.6±5.9
Val8Ala Biotin-YSSYSAPASSSLSVRRSYSSSSGS-CONH2 2684.4 10.3 −0.1 9.9±3.4 23.6±2.1
Ser9Ala Biotin-YSSYSAPVASSLSVRRSYSSSSGS-CONH2 2696.4 10.3 −0.1 23.3±8.4 27.1±4.8
Ser10Ala Biotin-YSSYSAPVSASLSVRRSYSSSSGS-CONH2 2696.4 10.3 −0.1 34.5±0 32.9±1.9
Ser11Ala Biotin-YSSYSAPVSSALSVRRSYSSSSGS-CONH2 2696.4 10.3 −0.1 2.5±2.5 15.9±6.5
Leu12Ala Biotin-YSSYSAPVSSSASVRRSYSSSSGS-CONH2 2670.4 10.3 0 0 15.5±2.8
Ser13Ala Biotin-YSSYSAPVSSSLAVRRSYSSSSGS-CONH2 2696.4 10.3 −0.1 12.2±0.8 16.6±5.2
Val14Ala Biotin-YSSYSAPVSSSLSARRSYSSSSGS-CONH2 2684.4 10.3 −0.1 0 13.8±3.9
Arg15Ala Biotin-YSSYSAPVSSSLSVARSYSSSSGS-CONH2 2627.3 9.7 −0.2 18.1±1.3 25.5±6.3
Arg16Ala Biotin-YSSYSAPVSSSLSVRASYSSSSGS-CONH2 2627.3 9.7 −0.2 0 15.6±3.0
Ser17Ala Biotin-YSSYSAPVSSSLSVRRAYSSSSGS-CONH2 2696.4 10.3 −0.1 4.6±1.8 18.1±4.4
Tyr18Ala Biotin-YSSYSAPVSSSLSVRRSASSSSGS-CONH2 2620.4 11.2 0 7.9±0.9 16.0±2.8
Ser19Ala Biotin-YSSYSAPVSSSLSVRRSYASSSGS-CONH2 2696.4 10.3 −0.1 5.2±0.7 14.5±2.7
Ser20Ala Biotin-YSSYSAPVSSSLSVRRSYSASSGS-CONH2 2696.4 10.3 −0.1 6.4±1.2 16.4±6.4
Ser21Ala Biotin-YSSYSAPVSSSLSVRRSYSSASGS-CONH2 2696.4 10.3 −0.1 55.4±5.9 31.6±5.1
Ser22Ala Biotin-YSSYSAPVSSSLSVRRSYSSSAGS-CONH2 2796.4 10.3 −0.1 19.7±5.0 24.1±1.0
Gly23Ala Biotin-YSSYSAPVSSSLSVRRSYSSSSAS-CONH2 2726.4 10.3 −0.1 6.2±6.2 16.9±4.5
Ser24Ala Biotin-YSSYSAPVSSSLSVRRSYSSSSGA -CONH2 2696.4 10.3 −0.1 44.3±6.7 29.4±0.6
Substitutions with functionally equivalent amino acids
Tyr1Phe Biotin- FSSYSAPVSSSLSVRRSYSSSSGS-CONH2 2696.4 11.2 −0.1 56.3±2.8 41.2±4.0
Leu12Val Biotin-YSSYSAPVSSSVSVRRSYSSSSGS-CONH2 2698.4 10.3 −0.1 58.6±5.0 43.8±1.7
Val14Leu Biotin-YSSYSAPVSSSLSLRRSYSSSSGS-CONH2 2726.4 10.3 −0.1 44.2±2.2 39.2±2.4
Arg16Lys Biotin-YSSYSAPVSSSLSVRKSYSSSSGS-CONH2 2684.4 10.1 −0.1 32.9±1.3 36.9±0.9